Riddles in the dark

I can't remember where I heard that phrase from... I want to say Lord of the Rings...

I've got something on my mind right now. Are there some people in the world who just never change? And if there are, how do you change them anyway. Is there anything you can say or do to make them understand? If a situation won't change no matter what you do, if the pattern proves to be consistant, is it still worth it to try just once more? Is it still worth it to believe that maybe, just maybe, something might be different... next time?